Chiral hydrogel electrolyte based on supramolecular assembly and preparation method thereof

By introducing a chiral hydrogel electrolyte with specific spatial asymmetry into an aqueous zinc-ion battery, the problems of disordered ion channels and insufficient free water binding in traditional gel electrolytes are solved, improving the mechanical properties and ion transport kinetics of the battery, suppressing zinc dendrites and vanadium cathode dissolution, and achieving high rate performance and long cycle life.

CN122291722APending Publication Date: 2026-06-26UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Application Number
CN202610723319.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-25
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Traditional non-chiral gel electrolytes in aqueous zinc-ion batteries suffer from disordered ion channels and insufficient free water binding, leading to zinc dendrite growth and vanadium cathode dissolution, which affects the battery's high-rate performance and cycle life.

Method used

A chiral hydrogel electrolyte based on supramolecular assembly is used to form a stereo-oriented supramolecular membrane by introducing a single pure configuration chiral guest molecule with specific spatial asymmetry into an achiral polymer substrate. This reshapes the polymer topology network, constructs ordered ion channels, and inhibits the activity of free water molecules.

Benefits of technology

It significantly improves the mechanical properties and ion transport kinetics of the battery, suppresses zinc dendrite growth and vanadium cathode dissolution, and achieves excellent battery performance and long cycle life at high rates.

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Abstract

This invention belongs to the field of chemical energy storage battery technology, specifically providing a chiral hydrogel electrolyte based on supramolecular assembly and its preparation method, to solve the problems of disordered ion channels and insufficient free water binding in traditional achiral gel electrolytes. This invention introduces a single, pure-configuration chiral guest molecule into an achiral polymer substrate, forming a supramolecular chiral membrane based on stereo-oriented supramolecular assembly. After swelling and saturation in an aqueous electrolyte, a chiral hydrogel electrolyte is obtained. The chiral guest molecule, acting as a topological guest, reshapes the polymer topology network, forming a stereo-oriented network, causing a sudden leap in the gel's energy storage modulus, thus providing resistance to dendrite penetration. Simultaneously, the chiral guest molecule can achieve interfacial stability at the negative electrode, further suppressing dendrite formation at the negative electrode. Furthermore, the stereo-oriented network can significantly limit the activity of free water molecules, eliminating the erosion of the vanadium cathode by free water molecules and vanadium dissolution.
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